/Engine/Source/Runtime/GeometryCore/Public/CompGeom/Delaunay2.h
Triangulate a polygon, and optionally pass back the resulting triangles Uses the 'solid' fill mode, and fills the polygon regardless of the edge orientation Note: TrianglesOut may be empty or incomplete if the input is self-intersecting. Note this clears any previously-held triangulation data, and triangulates the passed-in polygon from scratch
template<typename RealType> bool Triangulate ( const [TPolygon2](API\Runtime\GeometryCore\TPolygon2)< RealType > & Polygon, [TArray](API\Runtime\Core\Containers\TArray)< [FIndex3i](API\Runtime\GeometryCore\FIndex3i) > * TrianglesOut )